If you loved Der Glückspilz, try Das Appartement
Eine Brücke zwischen einem Film, den du schon gesehen hast, und einem, den kaum jemand kennt. Das teilen sie, und was der zweite macht, was der erste nicht macht.
Was sie teilen
Both films are directed by Billy Wilder, and they both carry the bittersweet mood tag, and they sit in Comedy / Drama territory. If that's the register that drew you to Der Glückspilz, the second film will land in a comparable space — through a different lens.
bittersweet
What Das Appartement is
New York, rainy nights, a lonely elevator. A minor clerk's apartment becomes a secret office perk, a place for executives to hide their affairs. Wilder's lens views corporate America with a cynical eye.

